鋯精礦質(zhì)量因資源而異，尚無(wú)國(guó)際通用標(biāo)準(zhǔn)，故各生產(chǎn)國(guó)所屬公司或廠家均根據(jù)其資源特點(diǎn)及用戶要求制定各自標(biāo)準(zhǔn)。我國(guó)鋯精礦國(guó)家標(biāo)準(zhǔn)見下表。 中國(guó)鋯英石精礦國(guó)家標(biāo)準(zhǔn)
級(jí)別
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